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Floatation process for oxidized coal slime

A technology for coal slime and clean coal, applied in flotation, solid separation and other directions, can solve the problems of large consumption of chemicals, low efficiency, poor floatability, etc., and achieve the effect of improving the effect of flotation

Inactive Publication Date: 2014-09-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, for oxidized coal slime, due to its strong surface hydrophilicity and poor floatability, the use of conventional reagents for flotation has a series of problems such as low efficiency and large consumption of reagents.

Method used

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  • Floatation process for oxidized coal slime
  • Floatation process for oxidized coal slime
  • Floatation process for oxidized coal slime

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: Carry out flotation test with Vc as reducing agent, kerosene as collector, and 2-octanol as foaming agent.

[0033] The flotation process of the present embodiment comprises the following steps:

[0034] Use Vc to test the dosage of reducing agent on oxidized coal slime. The specific operation steps are as follows: After the slurry level reaches the marking line, weigh a certain amount of Vc and add it to the flotation tank to adjust the slurry. After 2 minutes, add kerosene, continue to adjust the slurry for 1 minute, and then add Second-octanol, after stirring for 10s, start to scrape the bubbles, and the scraping time is 3min. The obtained product is filtered, dried, weighed and assayed.

[0035] In this example, the dosage of Vc is 1.25~10kg / t oxidized coal slime; the dosage of collector kerosene is 1000g / t; the dosage of foaming agent 2-octanol is 100g / t.

[0036] Present embodiment has chosen different Vc consumptions, and gained flotation test res...

Embodiment 2

[0040] Embodiment 2: Carry out flotation test with Vc as reducing agent, kerosene as collector, and 2-octanol as foaming agent.

[0041] In this embodiment, flotation tests were carried out for different pH values ​​of the ore slurry, and the pH values ​​were respectively selected as 3, 5, 6, 7, 9, and 11.

[0042] The flotation process of the present embodiment comprises the following steps:

[0043] (1) Add reducing agent Vc to the pulp, the dosage is 10000g / t, and mix the pulp and stir for 2min;

[0044] (2) Add collector kerosene, the dosage is 1000g / t, stir for 1min;

[0045] (3) Add the foaming agent 2-octanol, the dosage is 100g / t, and stir for 10s;

[0046] (4) Start to count and scrape bubbles for 3 minutes;

[0047] (5) The obtained product is filtered, dried, weighed and tested.

[0048] This embodiment carries out flotation test for the different pH values ​​of ore pulp, and the flotation test result of gained is shown in Table 3:

[0049] Table 3 Test results...

Embodiment 3

[0052] Example 3: The flotation test was carried out with Vc as reducing agent, span80 and kerosene compounded as collector, and 2-octanol as foaming agent.

[0053] The flotation process of the present embodiment comprises the following steps:

[0054] (1) Adjust the pulp to be neutral: adjust pH=7;

[0055] (2) Add the reducing agent ascorbic acid (Vc), the dosage is 1250g / t, and the slurry is stirred for 2 minutes;

[0056] (3) Add collector, the dosage is 1000g / t, stir for 1min;

[0057] The collector is compounded by span80 and kerosene, and the ratio of choosing Span80 and kerosene is: 20%: 80%;

[0058] (4) Add the foaming agent 2-octanol, the dosage is 100g / t, and stir for 10s;

[0059] (5) Start to count and scrape bubbles for 3 minutes;

[0060] (6) The obtained product is filtered, dried, weighed and tested.

[0061] The flotation test results under different reagent combinations are shown in Table 4:

[0062] Table 4 Flotation test results of oxidized coal sl...

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Abstract

The invention discloses a floatation process for oxidized coal slime and belongs to the technical field of coal washing and dressing. According to the method, the coal slime is reduced through organic reducing agents, then collecting agents and foaming agents are sequentially added to the coal slime and stirred, and finally clean coal and tailing products are floated. According to the method, as the organic reducing agents are added, the surface property of the coal slime is adjusted, the hydrophobic property of the coal slime is improved, and the floatation effect is improved; by the adoption of the floatation scheme, the floatation effect of the oxidized coal sling can be improved remarkably.

Description

technical field [0001] The invention relates to a coal slime flotation process, in particular to a oxidized coal slime flotation process, and belongs to the technical field of coal washing and processing. Background technique [0002] Flotation is an effective method for sorting coal slime. Adding appropriate surfactants in the flotation process can enhance the hydrophobicity and floatability of the coal slime surface, and can promote the dispersion of collectors in the slurry and the adsorption on the coal slime surface, thereby increasing the clean coal yield and tailings Ash content, reducing the consumption of reagents, greatly improving the effect of coal slime flotation, improving the effect of coal slime flotation, especially the flotation effect of difficult-to-float coal slime is very significant. [0003] However, for oxidized coal slime, due to its strong surface hydrophilicity and poor floatability, there are a series of problems such as low efficiency and large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03B1/04
Inventor 宋书宇李志红樊金串樊民强吴广玲
Owner TAIYUAN UNIV OF TECH
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